expm1
(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
expm1 — Returns exp(number) - 1, computed in a way that is accurate even when the value of number is close to zero
Description
expm1(float
$num): float
expm1() returns the equivalent to
'exp(num) - 1' computed in a way that is
accurate even if the value of num is near zero,
a case where 'exp (num) - 1' would be
inaccurate due to subtraction of two numbers that are nearly equal.
Parameters
-
num -
The argument to process
Return Values
'e' to the power of num minus one
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